Tetrahedron Asymmetry p. 3921 - 3926 (1997)
Update date:2022-08-04
Topics:
Rousset, Christophe J.
Iyer, Suresh
Negishi, Ei-Ichi
Chirally homogeneous (1S,8R)-3,5,9,9-tetramethyltricyclo[6.1.1.02,6] deca-2,5-diene 1 has been prepared in five steps and 42% overall yield from (-)-β-pinene; its successive treatment first with n-BuLi and then with ZrCl4 or HfCl4 provides, in high yields with high π-facial selectivity, the corresponding dichlorobis{η5-(1S,8R)-3,5,9,9-tetramethyltricyclo [6.1.1.02,6]deca-3,5-dien-2-yl}zirconium or hafnium, respectively.
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